CN110836755A - Water distribution pipe network leakage test equipment - Google Patents
Water distribution pipe network leakage test equipment Download PDFInfo
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- CN110836755A CN110836755A CN201911209126.9A CN201911209126A CN110836755A CN 110836755 A CN110836755 A CN 110836755A CN 201911209126 A CN201911209126 A CN 201911209126A CN 110836755 A CN110836755 A CN 110836755A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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Abstract
The invention discloses a water distribution pipe network leakage test device, which comprises a water tank, wherein the water tank is communicated with a water supply pipe and a water discharge pipe, the water supply pipe is provided with a pump and a main filter, a pipe section of the water supply pipe behind the pump is communicated with an inlet of a pressure relief pipe through a pressure relief valve, and an outlet of the pressure relief pipe is communicated with the water tank; the device also comprises a simulated water network, wherein the simulated water network comprises a main inlet joint, a main outlet joint and a main water pipe positioned between the main inlet joint and the main outlet joint, and the simulated water network also comprises a Chinese character hui local area pipe network, a Chinese character tian local area pipe network and a tree-shaped branched local area pipe network which are communicated with the main water pipe; and each branch water pipe of the three local area pipe networks is provided with a branch flow regulating valve and a pressure sensor. The water distribution pipe network leakage test equipment can simulate the leakage conditions of different pipe sections and accurately obtain the water pressure change values of the leakage pipe sections and the surrounding pipe sections.
Description
Technical Field
The invention relates to the technical field of monitoring and simulation of urban water distribution networks, in particular to leakage test equipment for a water distribution network.
Background
The water distribution network is an important component of the urban water supply system, and is a pipeline system for conveying tap water from a water plant to thousands of households. Due to the huge volume of the water distribution network, the phenomena of water leakage and rupture of partial water pipes are difficult to avoid, and if the water pipes are not treated in time, a large amount of water resources and energy resources are wasted every year. At present, a water pressure sensor is assembled on each section of water pipe, but because the connection relation of a pipe network is complex, branches are multiple, and one section of water pipe leaks water, pressure changes of sensors of a plurality of sections of water pipes around can be caused, so that the specific pipe section which is damaged and leaked is difficult to determine. And because the water pipe is buried deeply, can confirm whether damaged only after excavating, and because can't confirm the concrete pipe section revealed, can only excavate the pipe section that the pressure change appears in the periphery totally, the work load is too big, obviously does not possess the feasibility of actual operation.
At present, the industry hopes to obtain a scheme for relatively accurately presuming a specific damaged pipe section through the pressure change of each sensor, and reducing the screening range and the troubleshooting workload as much as possible. To obtain the scheme, a set of water distribution pipe network leakage test equipment is designed, and a real water distribution pipe network is subjected to abstract simulation to a certain degree so as to obtain the leakage rate of each pipeline and the pressure change value of the related pipeline, and provide a theoretical model and data support for actual investigation.
Disclosure of Invention
The invention aims to solve the technical problem of providing a water distribution pipe network leakage test device which can simulate the leakage conditions of different pipe sections and accurately obtain the water pressure change values of the leakage pipe sections and the surrounding pipe sections.
The technical scheme of the invention is that the leakage test equipment for the water distribution pipe network comprises a water tank, wherein the water tank is communicated with a water supply pipe and a water discharge pipe, the water supply pipe is provided with a pump and a main filter, a pipe section of the water supply pipe positioned behind the pump is communicated with an inlet of a pressure relief pipe through a pressure relief valve, and an outlet of the pressure relief pipe is communicated with the water tank;
the device also comprises a simulation water network, wherein the simulation water network comprises a main inlet joint, a main outlet joint and a main water pipe positioned between the main inlet joint and the main outlet joint; the simulated water network also comprises a square-shaped local area network, a field-shaped local area network and a tree-shaped branched local area network which are communicated with the main water pipe;
the square-shaped local pipe network consists of a return pipe and a communicating pipe for connecting the return pipe with a main water pipe, wherein the communicating pipe is provided with a branch flow regulating valve and a pressure sensor, and the return pipe is also provided with a branch flow regulating valve and a pressure sensor;
the field-shaped local pipe network comprises three warp-wise water pipes perpendicular to a main water pipe and two weft-wise water pipes parallel to the main water pipe, the middle weft-wise water pipe communicates the midpoints of the three warp-wise water pipes, the outer ends of the three warp-wise water pipes are communicated by the weft-wise water pipe at the outer side, the inner ends of the three warp-wise water pipes are communicated with one main water pipe, and a pipe section of the main water pipe between the front warp-wise water pipe and the rear warp-wise water pipe forms an inner weft-wise; the field-shaped local area network comprises nine nodes which are communicated in a longitude and latitude mode, and a branch pipe section between every two adjacent nodes is provided with a pressure sensor and a branch flow regulating valve;
the tree-shaped branched local pipe network comprises one-level branch water pipes communicated with a main water pipe, each one-level branch water pipe is provided with a pressure sensor and a branch flow regulating valve, the outlet of each one-level branch water pipe is connected with at least two second-level branch water pipes, each second-level branch water pipe is provided with a pressure sensor, and the tail end of each second-level branch water pipe is provided with a branch flow regulating valve.
Compared with the prior art, the water distribution pipe network leakage test equipment adopting the structure has the following advantages.
The water supply pipe leads out water in the water tank to supply water to the simulation water network, and the water discharge pipe discharges the water in the simulation water network into the water tank, so that water circulation of the whole water distribution network leakage test equipment is realized; the pump arranged on the water supply pipe provides circulating power, and the main filter can remove impurities in water, so that the blockage of the small-caliber water pipe of the simulation pipe network is avoided; in addition, when the simulation pipe network is switched by each water channel in the specific experiment process and the pressure is increased suddenly, the pressure relief pipe can be opened in time, so that part of water quantity is directly returned to the water tank through the pressure relief pipe without passing through the simulation water network, and the accidental burst of each pipeline is avoided.
The simulated water network abstracts and summarizes three most classical local area network networks from the complex and messy urban actual water distribution network so as to simulate three most common pipe distribution modes, namely a Chinese character 'hui' simulated water supply pipe supplies water to a single household; if the tree branches, the main pipe in the simulated cell respectively supplies water to each unit building pipeline, and each unit building pipeline respectively supplies water to each house independently; the Chinese character 'tian' simulates the water supply condition when all main waterways in the city are arranged in the Chinese character 'tian'. The simulation of the pipe network is about 1 point in the city, and the condition of leakage when the user does not use water is specifically analyzed below.
The branch flow regulating valve on the communicating pipe of the square-letter local area pipe network has two functions, controls the on-off of the local area pipe network and simulates the water leakage condition of the communicating pipe through the opening of the regulating valve body, the branch flow regulating valve of the return pipe simulates the leakage condition of the return pipe in different degrees, and the two pressure sensors of the communicating pipe and the return pipe can monitor and collect the corresponding pressure change values when different leakage quantities occur at the two positions or one of the two positions.
The field local area pipe network is totally a circle of eight branch pipe sections at the edge and four branch pipe sections distributed in a cross shape in the middle, and the twelve branch pipe sections are respectively provided with a corresponding pressure sensor and a branch flow regulating valve, so that water leakage of different degrees can be simulated at any branch pipe section, and the pressure value change conditions of the water leakage pipe section and the peripheral pipe section can be comprehensively and accurately collected.
Similarly, each branch pipe section of each level of the tree-shaped branched local pipe network is provided with a corresponding pressure sensor and a corresponding branch flow regulating valve, so that the condition that any branch pipe section of any level leaks to different degrees can be simulated, of course, the condition of simultaneous leakage can also be simulated, and the pressure value change conditions of the water leaking pipe section and the peripheral pipe section can also be comprehensively and accurately collected.
In summary, the idea of simulating the pipe network is to split the complex and difficult-to-quantify actual problem into three known quantifiable simple models for research, that is, the real complex concrete pipe network is split into the three basic classic local area networks, in other words, the classic local area networks with the measurable pressure values and leakage amounts are superposed to simulate most of the real water distribution networks. Through data acquisition and analysis of the three classic local area network networks, namely, independent analysis is carried out on each classic local area network, or a plurality of classic local area network networks are subjected to comprehensive analysis after being overlapped, and each specific number is acquired, a theoretical model and data support can be provided for actual investigation work. More generally, the simulation water network can adjust the specific leakage amount of each pipe section, and the pressure change values of the pipe section and the peripheral pipe section are obtained according to different leakage amounts, recorded and stored to form a plurality of groups of data of different pressure values corresponding to different pipelines and different leakage amounts.
The application method of the data is that when the pressure sensors at certain positions in the actual water distribution pipe network change, the specific pipe section which leaks when the same pressure value changes of the pressure sensors at the same positions in the simulated pipe network can be found by comparing the simulated data, and the pipe section which leaks on the actual water distribution pipe network is probably the pipe section at the same position. Therefore, approximate pipe sections with leakage can be found out through comparison and analysis according to data collected by the simulation pipe network, so that the screening range is narrowed as much as possible, and the workload of investigation is reduced.
Preferably, the two main water pipes are connected in parallel, and a main flow regulating valve is respectively arranged at the inlet and the outlet of each main water pipe; the upper main water pipe is communicated with the square-shaped local pipe network and the field-shaped local pipe network; the lower main water pipe is communicated with the tree-shaped branched local pipe network; thus, different local area networks are distributed on water networks of different layers, the main water pipe is opened alone, data of the tree-shaped branched local area network are collected independently, the branch flow regulating valve of one primary branch water pipe is closed completely, and if the primary branch water pipe on the left is cut off, leakage and pressure change values of the primary branch water pipe on the right and three secondary branch water pipes communicated with the primary branch water pipe on the right can be collected and researched more accurately; the data condition of the square-shaped local pipe network and the field-shaped local pipe network can be acquired simultaneously when the upper main water pipe is opened singly, the branch flow regulating valves of the communicating pipes of the square-shaped local pipe network are closed, the data of the square-shaped local pipe network can be acquired independently, the three branch flow regulating valves closest to the upper main water pipe on the three radial water pipes of the field-shaped local pipe network are closed, and the data of the square-shaped local pipe network can be acquired independently; and closing the three branch flow regulating valves on the three warp-direction water pipes far away from the upper main water pipe, so that the field shape can be changed into a Chinese character 'ri', and a new local area pipe network is obtained. In conclusion, the diversification of research samples is realized, the data condition of the local area network can be acquired independently, comprehensively or in multiple modes, and more accurate data support is provided for the simulation of actual working conditions.
Preferably, the simulation water network further comprises a middle main water pipe connected with the upper main water pipe and the lower main water pipe in parallel; the middle main water pipe can be additionally connected with three classical local area networks to simulate the change condition of leakage and pressure value of each pipe section when the three local area networks are mutually overlapped, and the middle main water pipe can be provided with a simulated local area network with the same shape according to the distribution shape of an actual pipe network in a certain area of a city; in other words, the arrangement of the middle trunk water pipe provides a connecting node and a mounting position for an additional water network with an indefinite form, and the reality degree and the practicability of the simulation are improved.
As another optimization, the water tank is also connected with a water inlet pipe, an overflow pipe and a water outlet pipe, the overflow pipe is provided with a first stop valve, the water outlet pipe is provided with a second stop valve, the overflow pipe is positioned at the upper part of the water tank, and the water outlet pipe is positioned at the lower part of the water tank; the water inlet pipe is communicated with tap water to supply water to the water tank, the overflow pipe can discharge excessive water in the water tank, the water level in the water tank is prevented from being too high, the structure is most suitable for being matched with a liquid level sensor such as a floating ball type sensor, when the sensor detects that the liquid level of the water tank is too high, a signal is sent to a main controller of the water distribution pipe network leakage test equipment, the first stop valve is opened to discharge water, and the liquid level of the water tank is stabilized to the height of the overflow pipe; and the water outlet pipe is arranged to thoroughly discharge water in the water tank, so that the inner wall of the water tank is favorably cleaned.
Preferably, the water drainage pipe comprises a vertical hard pipe section, a throttle valve and a flexible pipe section, an outlet of the vertical hard pipe section is communicated with an inlet of the flexible pipe section through the throttle valve, an outlet of the flexible pipe section is communicated with the water tank, the equipment further comprises a support, a vertical ball screw pair is arranged on the support, a lantern ring is arranged on a sliding block of the ball screw pair, the flexible pipe section penetrates through the lantern ring, and a bent part of the flexible pipe section is hooked on the lantern ring; thus, the ball screw pair is driven to lift the sliding block, the bent part at the top end of the flexible pipe section is lifted or lowered through the lantern ring, and the pump works in a matching way to convey water to the bent part at the top end of the flexible pipe section, so that the height of a water column is changed, and the total water pressure at two ends of an inlet and an outlet of the simulated water network is substantially changed; in other words, by adjusting the height of the lantern ring, variable total water pressure is provided for two ends of the simulated water network, so that data values of the simulated water network under different total pressures are enriched, multiple groups of data related to specific pressure values and leakage rates of each branch pipeline of the simulated pipe network under different total water pressures are obtained, and models are enriched, so that actual working conditions of the urban water distribution network under different total pressures in different seasons and at different temperatures are simulated more truly; moreover, the throttle valve is arranged at the inlet of the flexible pipe section, so that the opening of the valve body can be properly reduced, the flow can be controlled, and the defect that water cannot be pumped to the top of the flexible pipe section after the bending section of the flexible pipe section is pulled up is overcome.
Preferably, the drain pipe further comprises a main stop valve and a multi-way joint, a first port of the multi-way joint is communicated with the main stop valve, a second port of the multi-way joint is communicated with the vertical hard pipe section through a third stop valve, a third port of the multi-way joint is communicated with a hard U-shaped pipe through a fourth stop valve, and the hard U-shaped pipe is communicated with the water tank; thus, two drainage channels are formed substantially, wherein the rigid vertical pipe section and the flexible pipe section with variable total water pressure and the rigid U-shaped pipe with constant total water pressure can always maintain constant total water pressure through the second channel, so that the relative relation between the pressure value and the leakage rate of each branch pipeline of the pipe network under the working condition of constant total water pressure is constructed; and the switching process of the two water paths is simple and convenient, and only one of the third stop valve and the fourth stop valve needs to be opened.
Preferably, the multi-way joint is also provided with an additional joint, and the additional joint is communicated with the pressure relief pipe through a transition pipe; the setting purpose of the structure is as follows: after the simulation experiment is finished, water in the drain pipe, the simulation water net and the water supply pipe needs to be drained, the pipeline is prevented from being accumulated with water for a long time and rusted, and the water in the water supply pipe and the simulation water net can be discharged through the flow regulating valve in the simulation water net; and the water in the flexible pipe section of drain pipe and the stereoplasm U-shaped pipe back end standpipe all can directly fall back to the water tank under the dead weight, but the water of the vertical hard pipe section of drain pipe and stereoplasm U-shaped pipe anterior segment standpipe, then after opening third stop valve and fourth stop valve, through the transition pipe in this preference with the pressure release pipe arrange back to in the water tank.
Drawings
FIG. 1 is a schematic structural diagram of a water distribution network leakage test device of the present invention.
Fig. 2 is a schematic structural diagram of a simulated water network of the water distribution network leakage test equipment.
Fig. 3 is a schematic structural diagram of an upper water net of a simulated water net of the water distribution pipe net leakage test equipment.
Fig. 4 is a schematic structural diagram of a lower layer water network of a simulation water network of the water distribution network leakage test equipment.
FIG. 5 is a schematic structural diagram of the water distribution network leakage test equipment with the simulated water network removed.
Fig. 6 is a schematic view of the structure of fig. 5 after being deflected by a certain angle.
Shown in the figure are 1, a water tank, 2, a water discharge pipe, 2.1, a vertical hard pipe section, 2.2, a flexible pipe section, 3, a throttle valve, 4, a support, 5, a ball screw pair, 5.1, a slide block, 6, a lantern ring, 7, a total stop valve, 8, a multi-way joint, 9, a third stop valve, 10, a fourth stop valve, 11, a hard U-shaped pipe, 12, an additional joint, 13, a transition pipe, 14, a water supply pipe, 15, a pump, 16, a main filter, 17, a pressure release valve, 18, a pressure release pipe, 19, a water inlet pipe, 20, an overflow pipe, 21, a water outlet pipe, 22, a first stop valve, 23, a second stop valve, 24, an auxiliary filter, 25, a total inlet joint, 26, a total outlet joint, 27, a Chinese character 'hui' local pipe network, 27.1, a return pipe, 27.2, a communication pipe, 28, a Chinese character 'tian' local pipe network, 28.1, a warp-direction water pipe, 28.2, a weft-direction, 29.2, second grade branch water pipe, 30, branch flow control valve, 31, pressure sensor, 32, trunk flow control valve, 33, go up trunk water pipe, 34, lower trunk water pipe, 35, middle trunk water pipe, 36, test bench, 37, water receiving bucket, 38, control box, 39, fifth stop valve.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
As shown in fig. 1, 2, 3, 4, 5 and 6, the water distribution network leakage test device of the present invention comprises a water tank 1, a water supply pipe 14 and a water discharge pipe 2, wherein an inlet of the water supply pipe 14 is communicated with the water tank 1, and an outlet of the water discharge pipe 2 is communicated with the water tank 1. The water supply pipe 14 is provided with a pump 15 and a main filter 16, a pipe section of the water supply pipe 14 behind the pump 15 is communicated with an inlet of a pressure relief pipe 18 through a pressure relief valve 17, and an outlet of the pressure relief pipe 18 is communicated with the water tank 1.
The device also comprises a simulated water network which comprises a main inlet joint 25, a main outlet joint 26 and a main water pipe between the main inlet joint and the main outlet joint, wherein the outlet of the water supply pipe 14 is communicated with the main inlet joint 25, and the inlet of the water drainage pipe 2 is communicated with the main outlet joint 26.
The water tank 1 is also connected with a water inlet pipe 19, an overflow pipe 20 and a water outlet pipe 21, the overflow pipe 20 is provided with a first stop valve 22, the water outlet pipe 21 is provided with a second stop valve 23, the overflow pipe 20 is positioned at the upper part of the water tank 1, and the water outlet pipe 21 is positioned at the lower part of the water tank 1. An auxiliary filter 24 is arranged on the overflow pipe 20.
The drain pipe 2 includes total stop valve 7, the multi-way joint 8, vertical hard pipeline section 2.1, choke valve 3 and flexible pipeline section 2.2, total stop valve 7 communicates with the total outlet connection 26 of simulation water net and is responsible for the break-make of simulation water net total export, 8 first mouths of multi-way joint and total stop valve 7 intercommunication, 8 second mouths of multi-way joint communicate with the entry of vertical hard pipeline section 2.1 through a third stop valve 9, vertical hard pipeline section 2.1 export is through choke valve 3 and flexible pipeline section 2.2 entry intercommunication, the export of flexible pipeline section 2.2 communicates with water tank 1.
The equipment also comprises a support 4, wherein the support 4 of the embodiment is a stand column which is fixed outside the side wall of the water tank 1. Be equipped with vertical ball screw pair 5 on the support 4, be equipped with the lantern ring 6 on ball screw pair 5's the slider 5.1, the kink that flexible pipe section 2.2 passed lantern ring 6 and flexible pipe section 2.2 is hooked on the lantern ring 6.
The vertical hard pipe section 2.1 and the flexible pipe section 2.2 form a variable pressure drainage waterway.
In this embodiment, a constant pressure drainage waterway may be further added, that is, the third port of the multi-way joint 8 is communicated with a hard U-shaped pipe 11 through a fourth stop valve 10, and the hard U-shaped pipe 11 is communicated with the water tank 1.
An additional joint 12 is also arranged on the multi-way joint 8, and a fifth stop valve 39 is arranged on the additional joint 12; the additional connection 12 communicates with a pressure relief pipe 18 via a transition pipe 13.
In this embodiment, three high, medium and low main water pipes connected in parallel are arranged between the main inlet joint 25 and the main outlet joint 26 of the simulated water network, a main flow control valve 32 is arranged near the inlet of each main water pipe, and a main flow control valve 32 is also arranged near the outlet of each main water pipe.
The simulated water network also comprises a Chinese character 'hui' local area network 27, a Chinese character 'tian' local area network 28 and a tree-shaped branched local area network 29.
The square-shaped local area network 27 is composed of a square-shaped pipe 27.1 and a communicating pipe 27.2, the communicating pipe 27.2 is provided with a branch flow regulating valve 30 and a pressure sensor 31, and the square-shaped pipe 27.1 is also provided with the branch flow regulating valve 30 and the pressure sensor 31; the outer end of the communicating pipe 27.2 is communicated with the clip pipe 27.1, and the inner end of the communicating pipe 27.2 is communicated with the upper main water pipe 33.
The field-shaped local area network 28 comprises three warp-wise water pipes 28.1 perpendicular to an upper main water pipe 33 and two weft-wise water pipes 28.2 parallel to the upper main water pipe 33, the middle weft-wise water pipe 28.2 is used for communicating the midpoints of the three warp-wise water pipes 28.1, the outer ends of the three warp-wise water pipes 28.1 are communicated by the weft-wise water pipe 28.2 at the outer side, the inner ends of the three warp-wise water pipes 28.1 are communicated with the upper main water pipe 33, and a pipe section of the upper main water pipe 33, which is positioned between the first warp-wise water pipe 28.1 and the last warp-wise water pipe 28.1, forms one weft-wise water; the field-shaped local area network comprises nine nodes which are communicated in a longitudinal and latitudinal mode, and a branch pipe section between every two adjacent nodes is provided with a pressure sensor 31 and a branch flow regulating valve 30.
Of course, the upper main water pipe 33 is also provided with a pressure sensor 31 on the pipe section behind the Tian-shaped local area network 28.
The tree-shaped branched local pipe network 29 comprises two primary branch water pipes 29.1 communicated with a lower main water pipe 34, each primary branch water pipe 29.1 is provided with a pressure sensor 31 and a branch flow regulating valve 30, the outlet of each primary branch water pipe 29.1 is connected with at least two secondary branch water pipes 29.2, in the embodiment, one primary branch water pipe 29.1 on the left is communicated with the two secondary branch water pipes 29.2, and one primary branch water pipe 29.1 on the right is communicated with the three secondary branch water pipes 29.2; each secondary branch water pipe 29.2 is provided with a pressure sensor 31, and the tail end of each secondary branch water pipe 29.2 is provided with a branch flow regulating valve 30.
Of course, the pressure sensor 31 is also arranged on the pipe section of the lower main water pipe 34 behind the tree-shaped branched local pipe network 29.
The middle main water pipe 35 of the three main water pipes can be freely matched with segmented water pipes, connectors and the like, and is arranged according to the distribution and the trend of pipelines in a specific area of the urban water distribution network, so that a specific water network of a real community is simulated; or the three classic local area network networks are mutually superposed to simulate a network with a more complicated trend. In other words, the middle trunk water pipe 35 can be spliced into various different pipe networks according to the requirements of experimenters, and the spliced pipe networks are in indefinite forms, have randomness and variability, enrich the models, improve the simulation truth and are more visual.
Each branch flow regulating valve 30 of the present invention is provided with a water leakage port which can be opened, and the opening and closing of the water leakage port are also controlled by the main controller. When the leakage port is completely closed, the branch flow regulating valve 30 only plays a role of regulating the flow conventionally, and the leakage condition of different water amounts can be simulated after the leakage port is opened.
A test bed 36 is arranged below the simulation water net, a water receiving hopper 37 is arranged on the test bed 36, a water return port is arranged at the lower part of the water receiving hopper 37, and the water return port is communicated with the water tank 1 through a water return pipe. The water leaking from each flow control valve of the simulated water network falls into the water receiving bucket 37 and returns to the water tank 1 through the return pipe.
This test equipment still includes control box 38, and control box 38 casing is equipped with operation platform, is equipped with main control unit like the computer in the control box 38, and all valve bodies in this application and all pressure sensor 31 all with main control unit signal connection. For example, the pressure sensor 31 is provided with a signal transmitting module and the main controller is provided with a signal receiving module, and the main controller is also provided with a command transmitting module and each valve body is provided with a command receiving module.
Claims (7)
1. The utility model provides a water distribution pipe network leakage test equipment which characterized in that: the water tank (1) is communicated with a water supply pipe (14) and a water discharge pipe (2), the water supply pipe (14) is provided with a pump (15) and a main filter (16), a pipe section of the water supply pipe (14) positioned behind the pump (15) is communicated with an inlet of a pressure relief pipe (18) through a pressure relief valve (17), and an outlet of the pressure relief pipe (18) is communicated with the water tank (1);
the device also comprises a simulated water network, wherein the simulated water network comprises a main inlet joint (25), a main outlet joint (26) and a main water pipe positioned between the main inlet joint and the main outlet joint, the water supply pipe (14) is communicated with the main inlet joint (25), and the water discharge pipe (2) is communicated with the main outlet joint (26); the simulated water network also comprises a square-shaped local area pipe network (27), a square-shaped local area pipe network (28) and a tree-shaped branched local area pipe network (29) which are communicated with the main water pipe;
the Chinese character 'hui' local area pipe network (27) is composed of a return pipe (27.1) and a communicating pipe (27.2) for connecting the return pipe (27.1) and a main water pipe, a branch flow regulating valve (30) and a pressure sensor (31) are arranged on the communicating pipe (27.2), and the return pipe (27.1) is also provided with the branch flow regulating valve (30) and the pressure sensor (31);
the field-shaped local area network (28) comprises three warp-wise water pipes (28.1) perpendicular to a main water pipe and two weft-wise water pipes (28.2) parallel to the main water pipe, the middle weft-wise water pipe (28.2) communicates the midpoints of the three warp-wise water pipes (28.1), the outer ends of the three warp-wise water pipes (28.1) are communicated by the weft-wise water pipe (28.2) on the outer side, the inner ends of the three warp-wise water pipes (28.1) are communicated with the main water pipe, and the section of the main water pipe between the front warp-wise water pipe and the rear warp-wise water pipe (28.1) forms the weft-wise water pipe (28.2) on the inner side; the field-shaped local area network comprises nine nodes which are communicated in a longitude and latitude mode, and a branch pipe section between every two adjacent nodes is provided with a pressure sensor (31) and a branch flow regulating valve (30);
arborescent branching local area network (29) include one-level branch water pipe (29.1) with the main water pipe intercommunication, every one-level branch water pipe (29.1) is equipped with a pressure sensor (31) and a branch flow control valve (30), the exit linkage of every one-level branch water pipe (29.1) has two piece at least second grade branch water pipes (29.2), be equipped with a pressure sensor (31) on every second grade branch water pipe (29.2), every second grade branch water pipe (29.2) end is equipped with a branch flow control valve (30).
2. The water distribution network leak test apparatus as set forth in claim 1, wherein: the two main water pipes are connected in parallel, and a main flow regulating valve (32) is respectively arranged at the inlet and the outlet of each main water pipe; the upper main water pipe (33) is communicated with the square-shaped local area pipe network (27) and the square-shaped local area pipe network (28); the lower main water pipe (34) is communicated with the tree-shaped branched local pipe network (29).
3. The water distribution network leak test apparatus as set forth in claim 2, wherein: the simulated water network also comprises a middle main water pipe (35) which is connected with the upper main water pipe (33) and the lower main water pipe (34) in parallel.
4. The water distribution network leak test apparatus as set forth in claim 1, wherein: the water tank (1) is further connected with a water inlet pipe (19), an overflow pipe (20) and a water outlet pipe (21), a first stop valve (22) is arranged on the overflow pipe (20), a second stop valve (23) is arranged on the water outlet pipe (21), the overflow pipe (20) is located on the upper portion of the water tank (1), and the water outlet pipe (21) is located on the lower portion of the water tank (1).
5. The water distribution network leak test apparatus as set forth in claim 1, wherein: the drain pipe (2) comprises a vertical hard pipe section (2.1), a throttle valve (3) and a flexible pipe section (2.2), an outlet of the vertical hard pipe section (2.1) is communicated with an inlet of the flexible pipe section (2.2) through the throttle valve (3), an outlet of the flexible pipe section (2.2) is communicated with the water tank (1), the device further comprises a support (4), a vertical ball screw pair (5) is arranged on the support (4), a sleeve ring (6) is arranged on a sliding block (5.1) of the ball screw pair (5), and the flexible pipe section (2.2) penetrates through a bent part of the sleeve ring (6) and the flexible pipe section (2.2) and is hooked on the sleeve ring (6).
6. The water distribution network leak test apparatus as set forth in claim 5, wherein: the drain pipe (2) further comprises a main stop valve (7) and a multi-way joint (8), a first port of the multi-way joint (8) is communicated with the main stop valve (7), a second port of the multi-way joint (8) is communicated with a vertical hard pipe section (2.1) through a third stop valve (9), a third port of the multi-way joint (8) is communicated with a hard U-shaped pipe (11) through a fourth stop valve (10), and the hard U-shaped pipe (11) is communicated with the water tank (1).
7. The water distribution network leak test apparatus as set forth in claim 6, wherein: the multi-way joint (8) is also provided with an additional joint (12), and the additional joint (12) is communicated with a pressure relief pipe (18) through a transition pipe (13).
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| CN112179584A (en) * | 2020-09-23 | 2021-01-05 | 上海城市水资源开发利用国家工程中心有限公司 | Verification platform of water supply pipeline leak detection equipment |
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| CN110836755B (en) | 2021-10-22 |
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